{
  "id": "0805.2262",
  "version": "v3",
  "published": "2008-05-15T14:58:36.000Z",
  "updated": "2008-08-27T14:45:34.000Z",
  "title": "Search for the decay K_S->e+e-",
  "authors": [
    "Flavio Archilli",
    "for KLOE Collaboration"
  ],
  "comment": "4 pages, 4 figures, to appear in the proceedings of 43rd Rencontres de Moriond EW, La Thuile, Italy, 1-8 March 2008",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We present results of a direct search for the decay K_S->e+e- with the KLOE detector, obtained with a sample of e+e- -> phi -> K_S K_L events produced at DAFNE, the Frascati phi-factory, for an integrated luminosity of 1.9 fb-1. The Standard Model prediction for this decay is BR(K_S->e+e-) = 2 x 10^-14. The search has been performed by tagging the K_S decays with simultaneous detection of a K_L interaction in the calorimeter. Background rejection has been optimized by using both kinematic cuts and particle identification. At the end of the analysis chain we find BR(K_S->e+e-) < 9.3 x 10^-9 at 90% CL, which improves by a factor of ~15 on the previous best result, obtained by CPLEAR experiment.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2008-08-27T14:45:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "standard model prediction",
      "background rejection",
      "kloe detector",
      "direct search",
      "frascati phi-factory"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 785818,
      "adsabs": "2008arXiv0805.2262A"
    }
  }
}